Beater-roll.



BEATER ROLL.

APPLICATION HLED OCT. 11 1918.

Patented Feb. 25, 1919.

Z SHEETS-SHEET I.

LWVEN HERw A, J. ALLISON BEATER ROLL.

APPLICATION FILED OCT. 11.. 19:8.

Patented Feb. 25, 1919.

2 SHEETSSHEET 2.

ALBERT J ALLISON, OF DAYTON, OHIO, ASSIGNOR TO THE A. A. SIMONDS & SON COMPANY, OF DAYTON, OHIO, A CORPORATION OF OHIO.

HEATER-ROLL.

Application filed October 11, 1918.

To all whom it may concern:

Be it known that I, ALBERT J. ALLISON, residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Beater-Rolls, of which the following is a full. clear, and exact description.

My invention relates to rolls used in heating engines for beating paper pulp and particularly to an improved method of securing the heating bars in the rolls. Formerly the bars were secured in beater rolls by bands, which were heated and shrunk on. This practice has been found unsatisfactory, for reasons it is not necessary to enumerate here, one of which, however, is that since all of the bars depend on the same fastening device one bar cannot be removed from the roll without. ren'ioving the fastenings which hold all of the bars in place. One object of my present invention is to enable each bar to be put in or removed independently of and without disturbing any of the others. Another object is to simplify the manufacture of thefbars, thereby reducing their cost and improving their quality. Still another object is to secure the bars tightly in the carrying disks without subjecting the parts to excessive strains. Another object is to provide for certain adjustments, whereby variations and imperfections in the parts may be rendered inocuous.

In the accompanying drawings, which illustrate the preferred embodiment of my invention,

Figure 1 is a fragmental view of a beater roll constructed in accordance with my invention, part of the figure showing an end elevation and the remainder a section on line 1-1 of Fig. 4.

Fig. 2 is an enlarged end elevation of a bar and shim, showing with dotted lines the manner of interlocking them,

Fig. 3 is a fragmenta-l perspective View of the center disk, showing the peripheral slots to good advantage.

Fig. 4 is a longitudinal sectional view of the roll.

Fig. 5 is a perspective View of a bar.

Fig. 6 is a perspective View of a shim, and

Fig. 7 is a perspective view of an auxiliary or sub-shim.

The roll comprises three disks, 10, 11 and 12, keyed or otherwise secured to a shaft 13, the periphery'of each disk being provided Specification of Letters Patent.

Patented Feb. 25, 1919.

Serial No. 257,709.

with dovetail-shaped slots 14. The disks are so located on the shaft that the slots form straight longitudinal rows and a beating bar is set. in each row. The bar 15 is arranged to lie flat against one side of the slots, leaving a space on the other side, which is filled by a shim 16. The shim is provided with a tenon 17 which extends into a slot 18 in the bar. In inserting the bar it is displaced longitudinally far enough to allow the shims to be set in place against it, with the tenons in the slots 18; then the bar is moved endwise, carrying'the shims into the slots 14. The shims may be made of such thickness as to just fill the space not occupied by the bar, even so that it is necessary to drive the bar into place, but in practice it is best to make them a. little too thin and then make up the required thickness by laying thin pieces of metal 19 between the bar and shim. These auxiliary or sub-shims are provided with slots similar to slots 17, and are located and kept in place by the tenons 17. By means of the shims and sub-shims the bar may be fitted so that it must be driven into each of the three slots, each of the bars in the roll being thereby rigidly secured to the disks, independently of all the others. The spaces between the bars are then filled by wooden strips 20, in the usual way.

The bar shown in the drawing is of a preferred form, but it is not to be understood that in its application the invention is limited to this form of bar. Since the shim and bar are interlocked it is evident that any form of bar may be used. the cross section of the shim being made such as when combined with the section of thenbar will form at the inner edge of the bar a dovetailshaped whole. The bar might, for example be of uniform cross section throughout, or even be thinner at its inner than its outer edge, as is the case in some bars. Moreover, instead of n'iaking the slots 14, symmetrical, as in the present case, they may be made to lean forward or backward with reference to the direction in which the roll rotates, in order to accommodate them to the shape of the bar, at the same time retaining the dovetail form of slot.

One of the advantages of the present construction is that the bars may be rolled in long lengths to the required cross section and t in cut into pieces of the required length. All that thenlreinairts to lee-done is to pierce the slots 18. This makes a Very simple method of making the bars and since they are rolled to the required size and form the metal in them is made very dense and tough, this being the well known result of rolling metal to its final form. The shims are preferably made of malleable iron, not only because of its comparatively low cost but because of its great ductility. The bars being of steel it is of considerable advantage to make the shims of a more ductile material which will yield as it is driven into the slots and relieve the disks of excessive strain while holding the bars abundantly tight. A similar effect can be obtained by making the shims of comparatively hard metal and making the sub-shims of a yielding substance; either a ductile metal or perhaps some suitable non-metallic substance.

It is not to be understood that my invention is limited to the disclosed embodiment or the suggested modifications, as other modifications maybe made while remaining within the purview of the appended claims.

What I claim is as follows:

1 In combination with a beater bar, a shim having a cross section of such shape as when combined with the section of the bar;

will form a dovetail-shaped whole adapted to fit in a complementarily shaped slot in the periphery of a beater roll, and interlocking means between the shim and bar.

2. In combination with a beater bar, a

shim composed of relatively ductile metal,

having a cross section of such shape as when combined with the section of the bar will form a dovetail-shaped whole adapted to fit in a complementarily shaped slot in the periphery of a beaterroll, and interlocking means between the shim and bar.

3. In combination with a heater bar, a shim having a crosssection ofsuch shape as when combined with the section of the bar will form a dovetail-shaped whole, interlocking means between the shim and bar, and one or more sub-shims interposed between the bar and shim for the purpose of making the assemblage a desired thickness.

4. A beater roll comprising a plurality of disks mounted on a shaft. each disk having circumferential dovetail-shaped radial slots, the slots in the several disks being so located and spaced as to form parallel longitudinal rows; a beater bar adapted to lie in each row of slots, bearing against one side thereof but leaving a space between itself and the other side of the slots, shims adapted to fill said spaces, and interlocking means between the shims and bars.

5. In combination witha beater bar, a shim-having a. cross section of such shape as when combined with the section of the bar will form adovetail-shaped whole, interlocking means between the shim and bar, and one or more sub-shims interposed between the bar and shim for the purpose of making the assemblage a desired thickness, said shim or sub-shim, or both, being com- ]posed of a more ductile material than the In testimony whereof I ailix my signature in the presence of two subscribing witnesses.

ALBERT J. ALLISON.

Witnesses:

JOSEPH A. WORTMAN, F. K. FAssE'r'r. 

